Tea water is alkaline.

Tea water contains more tea polyphenols and ellagic acid, it is easy to form theophylline, and sometimes it can also affect the absorption of iron, it is easy to form precipitation.

The acidity and alkalinity of different teas vary. Green tea is the least acidic, black tea and oolong tea acidity is relatively strong, but are weakly acidic, indicating that the acidity of the tea soup is related to the type of tea and production methods.

Tea preservation methods:

1, bagged preservation: tea is the leaves and buds of different tea trees, brewing and drinking can play a different role, if you want to save the tea for a longer period of time, you can put the tea into a plastic bag for preservation, placed in a cool, ventilated environment, do not put in the sunshine or humid environment, it is easy to make the tea moldy.

2, canned preservation: prepare a clean sealing jar, put the tea into the plastic bag, squeeze out the air inside as much as possible, and seal it, and then put it into the sealing jar to seal it up, the sealing jar as much as possible to use the iron, so that will make the tea preserved for a longer period of time, don't use the rusty tin cans, which is easy to deteriorate the tea.

3, refrigerated preservation: there are many ways to preserve tea, preserved in a normal environment, can be preserved for about 18 months, in fact, you can also put the tea into a plastic bag, as far as possible will be sealed up airtight, and then put into the refrigerator to freeze up, so that it can be preserved for about two years or so, or maybe even longer.